The sitz bath is a good cure when done correctly and cost you nothing to do.
The pores have little worms in them (nice to know ha!)Deworming and cleansing the liver and digestive organs, etc. always helps.
"IF" the problem is long standing, I would suggest hormone problems such as too much estrogen, which also means liver problems, the use of hormone balance or cheaper herb called red raspberry leaf tea daily works. All the cleanses leads to the cure, not until your clean insode will your skin be clean.
The quick fix to drive the worms away is to use a Clark zapper for 1 hour+ daily for 10 straight days; this is not a cure, but may clear the face up. The worms and troubles may go inward and create a worse problem in the future??? I would still do all the clean ups even if I opted to zap the sitzs.